@catcry160 That button is not used to activate onion skin but to see either drawings or adjacent frames relative to the current frame you’re viewing. To activate onion skin you have to use the buttons on the “display panel” or press the hotkeys O (previous frame) and ALT + O (next frame)

Also once activated to modify the onion skin parameters you have to visit the preferences by going to EDIT > PREFERENCES > TOOLS > Onion Skin

oh ok… assuming the button that activates onion screen is kinda stupid of me. but i did what you said it doesn’t seem to work. it still doesn’t want to show any marks of the previous frame… and weirdly there something blocking some part of the canvas(you may call it something else idk)

well then…its the next day and i have tried to check on it again and the weird border is gone and i am totally that stupid for not looking that there an display under the color palette… maybe its easy to miss but its me…
everything is going smoothly now and there are no problems already
Sorry i might have wasted your time and thank you for the help…

Did you check turning the display panel buttons on and off /or alternatively go to View > Onion Skin > Next / Previous

Are you trying to onion skin a full picture or do you have a background? If yes, then this is the problem, currently Pencil2D shows the onion skin on the canvas, and if you have a BG it doesn’t show. So for now this is a bug, but you would have to onion skin with your BG or full canvas Image turned off.

If you need anything else please create a new thread for your particular problems so we can keep track of it more easily. Or if you want to chat in real time visit our discord server at http://pencil2d.org/community